Surface cooler.



No. 871,308. PATENTED NOV. 19, 1907. W. VASSEL. SURFACE COOLER.

APPLICATION FILED MAR. 22, 1906. v

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No. 871,308. I PATBNTED NOV. 19, 1907.

W. VASSEL.

SURFACE COOLER.

APPLICATION FILED HAILZZ. 1906.

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No. 871,308. 1111111113111) Nov. 19, 1907. VW. vAssEL.

SURFACE COOLER. APPLIGATION FILED 111111.22, '1906.

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No. 871,308. PATENTED. NOV. 19, 1907. W. VASSEL.

SURFACE COOLER.

APPLIOATION FILED MAB.. 22, 1906.

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Ytember 1905, Serial No. 280,479, so that the .4 is a vertical sectionthrough the line C-l) UNITED STATES WALTER VASSEL, OF CHARLOTTENBURG,GERMANY, ASSIGNOR TO THE FIRM HARTMANN, OF BERLIN, GERMANY.

SURFACE N o. 871,308. Specification of PATENT oEEroE.

OF RUD. A.

COOLER.

Letters Patent. Patented Nov. 19, 1907.

Original application filed September 28. 1905. Serial No. 280,479.Divided and this application filed March 22| 1906.

Serial No.

To all whom it lmay concern:

Be it known that l, WALTER VAssEL, a citizen of the Empire of Germany,residing i at Charlottenburg, in the Empire of Germany, have invented anew and useful Surface Cooler, of which the following is a speci'-fication.

This application is a division of an application, #280479, filed by meSept. 28/05.

My invention relates to improvements in surface coolers, wherebythecooling surface is considerably increased in proportion to the sizeof the cooler, so that the quantity of the cooling liquid is almostreduced to that of the liquid to be cooled.

The new surface cooler is more particularly intended for the use in aportable water purifier as described in my above mentioned applicationfora U. S. patent of the 28th Sepconsumption of combustible may bereduced to a minimum, since almost all the heat carried off with thepalatable drinking-water can be recovered with the aid of the coolingimpure water. The new surface cooler when applied to the portable waterpurifier is made so light, that the weight of the latter does not exceedthe allowable maximum. This portable water purifier will be even enabledto use the very impure water as a cooling water and afterwards to turnit into palatable drinking-water, which is of special importance incountries, .where water or combustible or both are rare or dear. Thechief improvement of the surface cooler consists in its specialconstruction, so that every particle of the impure cold water is obligedto thoroughly cool the hot sterilized water, while every particle of itis thoroughly heated.

I will now proceed to describe my invention with reference to theaccompanying; drawings, in which- Figure 1 is an elevation of the newsurface cooler, partly in section, an intermediate part being omitted,Fig. 2 is a plan of the same, partly in section, Fig. 3 is a verticalsection through the line AHB in Fig. 2, F ig.

in Fig. 2 (seen in the direction from right to left), and Fig. 5 is anelevation of one of the partition plates in the surface cooler, and Fig.6 is a perspective view o the surface by dotted lines, to show thegeneral arrangement of the inlets and outlets n Similar characters ofreference refer to similar parts throughout the several views.

The surface cooler consists of a rectangular frame 1 and two covers 2,2, which are all shown as made of sheet metal, so as to reduce theweight. The edges of the frame 1 on both sides are formed with flanges,which are stilened with flat-iron borders 3, 3 and a convenient numberof stays 4 (see Figs. 3 and 6). The frame 1 is placed verticaliy and isprovided on the sides with four cast bends 5, 5 above and two castconnections 6, 6 below. ln the four bends 5, 5 above (see Fig. 6) theends of the respective tubes are to be fastened. To the two connections6, 6 below outlet cocks or the like may be attached.

Vithin the frame 1 a thin sheet metal plate 7 is disposed, which isrepeatedly bent in a zigzag line in a manner clearly shown at Fig. 2.The upper and lower edges of this sheet metal plate 7 are soldered onthe internal faces of the frame 1 between distance pieces S, 8. Shouldit not be possible to make in one piece the very long plate 7, which ispreferably made of copper or a similar material, it may be made ofseveral pieces which are united by folding and soldering, as is clearlyshown at 9, 9 in Fig. 2. Between the two opposite sides of the frame 1and the two end pieces of the plate 7 two vertical partitions 10, 10(see Figs. 2 and 4) are secured by soldering or otherwise, which reachfrom the top down to the bottom and divide the end spaces into twocompartments each. A convenient number of distance pieces 11, 11 of bentsheet metal is preferably disposed between the two opposite sides of theframe 1 and the end pieces of the plate 7.

From an examination of Fig. 2 it will be clear, that two series ofwater-tight pockets are formed on both sides of the frame 1 by thezigzagplate 7, which pockets alternate with each other and face the twocovers 2, 2 respectively. The edges of these pockets are at about thesame distance from the two covers 2, 2, as the end pieces of the plate 7from the sides of the frame 1. Into the several pockets a correspondingnumber cooler onlythe rear outlines being indicated of partition plates12, 12 of the shape shown at Fig. 5 can be inserted. These plates 12, 12are preferably made of thin sheet copper or of a similar material andhave soldered on them on both sides a number of parallel horizontaldistance pieces 13, 13, whereby they are held in the middles of therespective ockets. These distance pieces 13, 13 may e metal strips,which are bent longitudinally in the middle. The one side edge of eachpartition plate 12 is cut out at 14, 14, see Fig. 5, while the oppositeside edge is slightly bent (see Fig. 2) and is arranged to bear againstthe respective cover v2. The

three projections 15, 15 of the partition 12 are to bear on the bottomof the respective pocket, so that openings are formed by the cuts 14,14, through which the water can pass from the one side of the partition12 to the other side. lThe two covers 2, 2 are stiened with flat-ironborders 16, 16 and a number of vertical T-iron bars 17, 17. Suitablepackings 18, 18 are inserted between theflanges of the frame 1 and thecovers 2, 2 and bolts and nuts 19, 19 are employed for tightening thesurface cooler. It is to be noted, that the two covers 2, 2 should bearon the slightly bent edges of the partition plates 12, 12, so as topress their pro- `jections 15, 15 on the bottoms of the pockets and toprevent the water from passing along the covers. It is evident, that avery long and narrow passage in a serpentine line is thus formed for theimpure water entering the cooler say through the right rear bend 5 inFig. 6, and passing through the cooler in the direction of the arrows20, 20, in Fig. 2, until it leaves the cooler through the left rear bend5 in Fig. 6. A similar very long and narrow passage in a serpentine lineis also formed for the hot sterilized water, which enters the coolerthrough the left front bend 5 in Fig. 6 and passes Athrough the coolerin a direction opposite to that of the impure water, that is to say inthe direction of the arrows 21, 21 in Fig. 2 until it leaves the coolerthrough the right front bend 5. As every pocket is again divided intotwo channels by the partition plate 12 it follows, that every particleof the impure water is guided in the prescribed manner and is preventedfrom mixing with other particles. The same is true of the hot sterilizedwater. Therefore the impure water is compelled to cool the hotsterilized water, with which it is in contact by means of the plate 7,uniformly at every step of its path and gradually in the direction ofits path. The impure water enters in the cold state the cooler andleaves the same in a hot state, while the hot sterilized water enteringthe cooler at the opposite end leaves the cooler with a temperature,which is nearly equal to that of the cold impure water. The partitionplates 12, 12' compel the cold impure water to take the prescribed longpath,

in order to take up nearly all the heat from the hot sterilized water,which latter is in a similar manner compelled to take its prescribedlong path through the cooler, to insure the desired cooling effect.

The weight of the surface cooler can be made moderate by employing forthe zigzagplate 7 and the partition plates 12, 12 very thin sheet metal,such as copper or nickel, which may be made but a few tenths of amillimeter thick. In cases, where the weight of the. cooler is of noimportance, of course the frame 1 and the two covers 2, 2 may be made ofa cheaper material, such as cast-iron or the like.

The cooler can be easily cleaned, as its two covers 2, 2 can be taken 0Hand the several partition plates 12, 12 can be withdrawn. This is also agreat advantage of the new surface cooler. The connections 6, 6 may beused for washing out the surface cooler, if so preferred, or they may beused for drawing off quantities or samples of the liquids. The surfacecooler may be used for other purposes than portable water purifiers.Other liquids instead of water may be passed through the cooler.

The surface cooler may be varied in many respects without departing fromthe spirit of my invention. l

What I claim as my invention, and desire to secure by Letters Patent,is-

1. A surface cooler having removable covers on both sides and comprisinga plurality of parallel and narrow pockets placed side by side and ofuniform width which alternately face the two covers respectively and aremade of thin sheet metal, in combination with a plurality of ribbedpartition plates of sheet metal cut out at the one edge and slightlybent at the opposite edge and adapted to be inserted in the severalpockets of the said surface cooler to form two separate serpentinepassages.

2. A surface cooler comprising a rectangular frame with two partitionsribs within and four tubular connections without on two oppositesides,removable covers on both sides of said rectangular frame, a thinsheet metal plate bent in a zigzag-line within said rectangular frameand secured with its edges on the other two opposite sides thereof, sothat a plates made of thin sheet metal, provided with a plurality ofparallel ribs on both sides, cut out at the one edge and vslightly bentat the opposite edge, these partition plates bev ing adapted to beinserted in the alternating pockets to their bottoms and to bear withtheir bent edges on said two covers respectively, Wherebytwo separateserpentine passages are formed 1n the surface cooler.

3. In a surface cooler, the combination With a vertical rectangularframe with two plate bent in a Zigzagline within. said verticalrectangular frame and secured with its edges on the upper and lowerinsides thereof, so that a plurality of parallel and narrow pockets ofuniform width are formed, which alternately i face said two covers, theend pieces of said zigzag sheet metal plate being secured on thepartition ribs of said vertical rectangular frame, and a plurality ofpartition plates made of thin sheet metal, provided with a plurality ofhorizontal ribs on both sides, cut out at the one edge and slightly bentat the opposite edge, these partition plates being adapted to beinserted in the alternating pockets to their bottoms and to bear withtheir bent edges on said two covers respectively, whereby two separateserpentine passages are formed in the surlace cooler.

ln testimony whereof I have signed my name to this specilication in thepresence ol" two subscribing witnesses.

l/VALTER VASSEL. lVitnesses VOLDEMAR HAUPT, HENRY l-IAsPER.

